Engine Control System Operation Inspection - Mazda Mazda6 Workshop Manual Supplement

STEP
3 Perform self-test function using WDS or
equivalent.
Turn engine switch to ON.
Retrieve any DTC.
Is DTC displayed?
4 Inspect for following:
• Fuel quality (e.g.: including water
contamination, winter/summer blend)
• Fuel line/fuel filter clogging and/or restriction
• Intake-air system restriction
• Exhaust system and/or catalyst converter
restriction
• Charge air cooler condition (restriction or
damaged)
• Vacuum leakage
• Cooling fan No.1 and cooling fan No.2 seat
Are all items okay?
5 Inspect intake shutter valve and VSC valve
operations.
(See F2–229 ENGINE CONTROL SYSTEM
OPERATION INSPECTION)
Is there any problem?
6 Inspect guide blade valve operation.
(See F2–229 ENGINE CONTROL SYSTEM
OPERATION INSPECTION)
Is there any problem?
7 Inspect A/C cut-off operation.
Does A/C cut-off work properly?
8 Inspect hose bands between following parts:
• Turbocharger compressor housing and air
cleaner
• Turbocharger compressor housing and
charge air cooler
Are hose bands loose?
9 Inspect for improper operation, kinks, clogging or
disconnection on guide blade actuator.
(See F2–229 ENGINE CONTROL SYSTEM
OPERATION INSPECTION)
Is actuator okay?
10 Remove parts necessary to inspect
turbocharger.
Do not remove turbocharger.
Inspect if turbocharger compressor wheel is
bent, damaged, or interfering with housing on
vehicle.
Is there any problem?
11 Inspect if turbocharger compressor wheel
locknut is loose or has fallen down inside
turbocharger.
Is there any problem?
12 Inspect if turbocharger compressor wheel by
hand.
Does wheel turn easily and smoothly?
F2–196
TROUBLESHOOTING
INSPECTION RESULTS
Yes DTC is displayed:
Go to appropriate DTC test.
Communication error message is displayed:
Inspect for following:
• Open circuit between PCM control relay and PCM
terminal 53 or 79
• Open circuit PCM control relay and PCM terminal
69
• PCM control relay stuck open
• Open or poor GND circuit (PCM terminal 65, 85,
103 or 104)
• Poor connection vehicle body GND
No No DTC is displayed:
Go to next step.
Yes Go to next step.
No Service as necessary.
Repeat Step 4.
Yes Repair or replace as necessary.
No Go to next step.
Yes Repair or replace as necessary.
No Go to next step.
Yes Go to next step.
No Repair or replace malfunctioning part according to A/C
cut-off system inspection results.
Yes Retighten hose bands.
If concern is resolved, complete inspection.
If concern still exists, go to next step.
No Go to next step.
Yes Go to next step.
No Repair or replace as necessary.
If concern is resolved, complete inspection.
If concern still exists, turbocharger is okay.
Go to next step.
Yes Replace turbocharger.
No Go to next step.
Yes Replace turbocharger.
No Go to next step.
Yes Go to next step.
No Replace turbocharger.
ACTION